diff --git a/HW10/CMakeLists.txt b/HW10/CMakeLists.txt
index 86940ef..fdcf455 100644
--- a/HW10/CMakeLists.txt
+++ b/HW10/CMakeLists.txt
@@ -1,10 +1,10 @@
 cmake_minimum_required(VERSION 3.15)
 project(HW10)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 11)
+SET(CMAKE_CXX_COMPILER mpicxx)
 find_package(MPI REQUIRED)
 
 add_definitions(-DOMPI_SKIP_MPICXX)
-
 set(HEADER_FILES
         MakePermutationMatrix.h
         ReadFromFile.h
@@ -17,7 +17,7 @@ set(SOURCE_FILES
 set(CMAKE_CXX_STANDARD 17)
 
 add_executable(HW10 ${HEADER_FILES} ${SOURCE_FILES} main.cpp)
-set_property(TARGET HW10 PROPERTY CXX_STANDARD 17)
+set_property(TARGET HW10 PROPERTY CXX_STANDARD 11)
 
 target_compile_options(HW10 PRIVATE -Wall -Wextra -pedantic -Wl,--stack,10000000 -O3)
 target_link_libraries(HW10 PRIVATE MPI::MPI_C)
diff --git a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/CXX.includecache b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/CXX.includecache
index 61afb55..de6f05b 100644
--- a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/CXX.includecache
+++ b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/CXX.includecache
@@ -8,10 +8,6 @@
 
 /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/City.h
 
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp
-CostMatrixGenerator.h
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.h
-
 /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.h
 City.h
 /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/City.h
@@ -20,22 +16,6 @@ cmath
 vector
 -
 
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp
-MakePermutationMatrix.h
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.h
-
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.h
-City.h
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/City.h
-vector
--
-
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/ReadFromFile.cpp
-filesystem
--
-ReadFromFile.h
-/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/ReadFromFile.h
-
 /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/ReadFromFile.h
 City.h
 /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/City.h
diff --git a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/build.make b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/build.make
index af6e356..d5f8ea4 100644
--- a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/build.make
+++ b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/build.make
@@ -60,54 +60,54 @@ include CMakeFiles/HW10.dir/flags.make
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-	/Library/Developer/CommandLineTools/usr/bin/c++  $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.o -c /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp
+	mpicxx  $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.o -c /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp
 
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 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green "Preprocessing CXX source to CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.i"
-	/Library/Developer/CommandLineTools/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp > CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.i
+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp > CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.i
 
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+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -S /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/MakePermutationMatrix.cpp -o CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.s
 
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+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/ReadFromFile.cpp > CMakeFiles/HW10.dir/ReadFromFile.cpp.i
 
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+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -S /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/ReadFromFile.cpp -o CMakeFiles/HW10.dir/ReadFromFile.cpp.s
 
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 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green --progress-dir=/Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/cmake-build-debug/CMakeFiles --progress-num=$(CMAKE_PROGRESS_3) "Building CXX object CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.o"
-	/Library/Developer/CommandLineTools/usr/bin/c++  $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.o -c /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp
+	mpicxx  $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.o -c /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp
 
 CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.i: cmake_force
 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green "Preprocessing CXX source to CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.i"
-	/Library/Developer/CommandLineTools/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp > CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.i
+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp > CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.i
 
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+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -S /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/CostMatrixGenerator.cpp -o CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.s
 
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+	mpicxx  $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o CMakeFiles/HW10.dir/main.cpp.o -c /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/main.cpp
 
 CMakeFiles/HW10.dir/main.cpp.i: cmake_force
 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green "Preprocessing CXX source to CMakeFiles/HW10.dir/main.cpp.i"
-	/Library/Developer/CommandLineTools/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/main.cpp > CMakeFiles/HW10.dir/main.cpp.i
+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -E /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/main.cpp > CMakeFiles/HW10.dir/main.cpp.i
 
 CMakeFiles/HW10.dir/main.cpp.s: cmake_force
 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green "Compiling CXX source to assembly CMakeFiles/HW10.dir/main.cpp.s"
-	/Library/Developer/CommandLineTools/usr/bin/c++ $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -S /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/main.cpp -o CMakeFiles/HW10.dir/main.cpp.s
+	mpicxx $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -S /Users/bradybodily/Repositories/CS5500_Parallel_Programming/HW10/main.cpp -o CMakeFiles/HW10.dir/main.cpp.s
 
 # Object files for target HW10
 HW10_OBJECTS = \
diff --git a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/flags.make b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/flags.make
index 8993194..7560fff 100644
--- a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/flags.make
+++ b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/flags.make
@@ -1,8 +1,8 @@
 # CMAKE generated file: DO NOT EDIT!
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-CXX_FLAGS = -g -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk   -Wall -Wextra -pedantic -Wl,--stack,10000000 -O3 -std=gnu++1z
+# compile CXX with mpicxx
+CXX_FLAGS = -g -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk   -Wall -Wextra -pedantic -Wl,--stack,10000000 -O3 -std=gnu++11
 
 CXX_DEFINES = -DOMPI_SKIP_MPICXX
 
diff --git a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/link.txt b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/link.txt
index 9a4d847..981b580 100644
--- a/HW10/cmake-build-debug/CMakeFiles/HW10.dir/link.txt
+++ b/HW10/cmake-build-debug/CMakeFiles/HW10.dir/link.txt
@@ -1 +1 @@
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+mpicxx  -g -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names -L/usr/local/Cellar/libevent/2.1.11_1/lib CMakeFiles/HW10.dir/MakePermutationMatrix.cpp.o CMakeFiles/HW10.dir/ReadFromFile.cpp.o CMakeFiles/HW10.dir/CostMatrixGenerator.cpp.o CMakeFiles/HW10.dir/main.cpp.o  -o HW10 /usr/local/Cellar/open-mpi/4.0.2/lib/libmpi.dylib 
diff --git a/HW10/cmake-build-debug/HW10 b/HW10/cmake-build-debug/HW10
index 39c1e0a..d339ac6 100755
Binary files a/HW10/cmake-build-debug/HW10 and b/HW10/cmake-build-debug/HW10 differ